I am getting some new tires and I thought about getting the 2.10''. Now my old tires are 1.95'' and it looks like I have plenty of room. What is the main reason for a bigger tire? Is it just to be more stable and smooth? It looks like they might slow me down a little more. I will be using them mainly in a street?park enviornment. Thanks for the help. I guess most tubes are universal so the same tube I am using now should work.